<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>task3</title>
    <style>
        .circle{
            position:fixed;
            margin: 1px;
            height:100px;
            width:100px;
            background-color:rgb(238, 243, 244);
            text-align:center;
            top: 0;
            border-radius:50%;
        }
        .circle:hover{
            background-color:rgb(248, 245, 245);
            transition: background-color 1s ease 0.3s;
           box-shadow: inset 20px 20px 30px 5px black;
        }
        .circle:active{
            background-color:rgb(57, 61, 57);
            transition:background-color 1s ease 0.3s;
        }
    </style>
</head>
<body>
    <div class="circle">
    </div>
</html>